Photocatalytic Activity of TiO&lt;sub&gt;2&lt;/sub&gt; Films with Rutile/Anatase Mixed Crystal Structures

曹永强,; 龙绘锦,; 陈咏梅,; 曹亚安,

doi:10.3866/pku.whxb20090619

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…It has been reported that the photocatalytic activities of TiO2 thin film composed by the mixed phase of rutile and anatase increase with the increasing content of anatase. 27,28 Simultaneously, if the Ar/O2 flow ratios were kept constant, then TiO2 thin film deposited at 2.0 Pa would show that the amounts of the generated acetone and CO2 were the largest. As evident from Fig.6, TiO2 film deposited at 2.0 Pa with the Ar/O2 flow ratio of 1:1 showed the highest photocatalytic activity.…”

Section: Vol28mentioning

confidence: 99%

Effects of Total Pressure and Ar/O2 Flow Ratios on Photocatalytic Properties of TiO2 Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Chen¹,

Tan²,

Tao³

2012

Acta Physico-Chimica Sinica

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Polycrystalline TiO2 thin films were prepared by direct current facing-target magnetron sputtering at different sputtering pressures and Ar/O2 flow ratios. The average thickness of all prepared films was 200 nm, measured by surface roughness tester. With increase in sputtering pressure (ptot), the prepared films changed from mixtures of anatase and rutile phases to pure anatase. The influences of different sputtering pressures and Ar/O2 flow ratios on surface morphology of prepared films were investigated by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The film surface was found to become rougher with increasing pressure and Ar/O2 flow ratios. Photocatalytic activities of the prepared TiO2 thin films were investigated by decomposition of iso-propanol (IPA) with initial concentration of 100×10-6 (volume fraction) under UV irradiation. The IPA was oxidized to acetone and further to carbon dioxide. TiO2 thin film deposited at 2.0 Pa with an Ar/O2 flow ratio of 1:1 showed the highest photocatalytic activity and maintained a high stability constant during the reaction.

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Section: Vol28mentioning

confidence: 99%

Effects of Total Pressure and Ar/O2 Flow Ratios on Photocatalytic Properties of TiO2 Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Chen¹,

Tan²,

Tao³

2012

Acta Physico-Chimica Sinica

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Effect of crystallographic structure of iridium based oxides on electrochemical degradation

Sun

Cao

Yang

2018

Electrochimica Acta

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Ultrahigh Charge Separation Achieved by Selective Growth of Bi₄O₅I₂ Nanoplates on Electron-Accumulating Facets of Bi₅O₇I Nanobelts

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Ultrahigh charge separation was observed in Bi 4 O 5 I 2 /Bi 5 O 7 I two-dimensional (2D)/one-dimensional (1D) hierarchical structures (HSs) constructed by selective growth of 2D monocrystalline Bi 4 O 5 I 2 nanoplates on the electron-accumulating (100) facet of 1D monocrystalline Bi 5 O 7 I nanobelts. In addition to the presence of type-II heterojunction between Bi 4 O 5 I 2 and Bi 5 O 7 I elementary entities in 2D/1D HSs, the type-II (100)/ (001) surface heterojunction in Bi 5 O 7 I nanobelt substrates was also confirmed by means of density functional theory (DFT) calculations and selective photoreduction/oxidation deposition experiments. The synergistic effect of two kinds of heterojunctions in Bi 4 O 5 I 2 /Bi 5 O 7 I 2D/1D HSs endowed them with ultrahigh charge carrier separation and transfer characteristics. In contrast with the control sample (BB40-C) constructed by growing Bi 4 O 5 I 2 nanoplates on whole four sides of Bi 5 O 7 I nanobelts, Bi 4 O 5 I 2 /Bi 5 O 7 I 2D/1D HSs demonstrated significantly enhanced charge transfer between Bi 5 O 7 I nanobelt substrates and Bi 4 O 5 I 2 nanoplates, owing to respective electron and hole accumulations on (100) and (001) facets of Bi 5 O 7 I substrates caused by ( 100)/ (001) surface heterojunction. The enhanced separation behavior was successfully verified by steady/transient-state photoluminescence, electrochemical techniques, and photocatalytic degradation experiments. Based on the above effective charge separation of Bi 4 O 5 I 2 /Bi 5 O 7 I 2D/1D HSs as well as the routine advantages for 2D/1D HSs, such as the excellent charge transport in monocrystalline elementary entities, much higher specific surface area, and enhanced light absorption by multiple reflections, the optimal BB40 HSs demonstrated ultrahigh photocatalytic performance than the control samples, whose apparent rates for Rhodamine B [or tetracycline hydrochloride (TC)] degradation were 7.1 (2.9 for TC), 10.3 (4.7 for TC), and 2.2 (1.7 for TC) times those of pristine Bi 5 O 7 I nanobelts, Bi 4 O 5 I 2 nanoplates, and BB40-C, respectively. It is hoped that this crystal facet selection during the heterostructure construction in this work could provide a new strategy or some enlightenment for the exploration of highly active 2D/1D HSs or other-dimensional heterostructure nanomaterials applied in the fields of photocatalysts, solar cells, sensors, and others.

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Photocatalytic Activity of TiO<sub>2</sub> Films with Rutile/Anatase Mixed Crystal Structures

Cited by 6 publications

References 9 publications

Effects of Total Pressure and Ar/O<sub>2</sub> Flow Ratios on Photocatalytic Properties of TiO<sub>2</sub> Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Effects of Total Pressure and Ar/O<sub>2</sub> Flow Ratios on Photocatalytic Properties of TiO<sub>2</sub> Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Effect of crystallographic structure of iridium based oxides on electrochemical degradation

Ultrahigh Charge Separation Achieved by Selective Growth of Bi₄O₅I₂ Nanoplates on Electron-Accumulating Facets of Bi₅O₇I Nanobelts

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Photocatalytic Activity of TiO<sub>2</sub> Films with Rutile/Anatase Mixed Crystal Structures

Cited by 6 publications

References 9 publications

Effects of Total Pressure and Ar/O<sub>2</sub> Flow Ratios on Photocatalytic Properties of TiO<sub>2</sub> Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Effects of Total Pressure and Ar/O<sub>2</sub> Flow Ratios on Photocatalytic Properties of TiO<sub>2</sub> Thin Films Deposited by Direct Current Facing-Target Magnetron Sputtering

Effect of crystallographic structure of iridium based oxides on electrochemical degradation

Ultrahigh Charge Separation Achieved by Selective Growth of Bi4O5I2 Nanoplates on Electron-Accumulating Facets of Bi5O7I Nanobelts

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Ultrahigh Charge Separation Achieved by Selective Growth of Bi₄O₅I₂ Nanoplates on Electron-Accumulating Facets of Bi₅O₇I Nanobelts